(Criminal record or evictions or something?) 

You should consult an attorney to determine whether you can exclude applicants with a criminal history, even sex offenders in your area.

CRIMINAL DEFENSE DIVISIONCalifornia Civil Code § 2945.4 CC – Foreclosure Consultant Violations - https://www.shouselaw.com/ca/defense/civil-code/2945-4/  

HUGE time saver.Individual property accounting - keep track of how profitable (or not) each individual property (or unit) is.App for tenants - so they can look at their balance, make payments, report maintenance issues.Rental applications and tenant screening - Accept online rental applications and then run credit, criminal, eviction checks on them easily.Market your vacancies - getting a vacant unit filled with a good tenant as quick as possible is critical, and good software will help you market those vacancies. 

We know for a FACT these  criminals are STILL in business working and stealing people's money! 

Or should i say criminal behavior which doing this and wiring in your money then they go dark on you is of course a criminal act.

The tenants are just poor, not necessarily criminals, although some are.PP range from 10-22k a unit, a mix of houses and duplexes... rents range from 375 for a small 1 bed to 650 for a 3 bed house. 

No evictions or criminal reports. 

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

They try and get criminal offenses for not mowing the lawn.